O.K. I reached a milestone today.MY first 9volt battery went out,bass quit working(I surpised myself, figured it out right away). Since I bought this bass as a scratch and dent,(Yamaha 760aII ) and didn't get a manual ,I was wondering how or if you could turn off the electronics on this thing. Is it always on or does the rca plug turn it on or what? On a lighter side ,is there a quickier or easy way to test a 9volt battery than to lick it?